# Data School vs IELTS Speaking Writing Prep 9

The clearest difference is ads: Data School at none against IELTS Speaking Writing Prep 9's shown. Data School also leads on iOS requirement (12.4 vs 15.1). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Data School sells 27 one-off in-app purchases and IELTS Speaking Writing Prep 9 sells 3 in-app purchases, starting at $12.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Data School ships an update every 2 weeks, IELTS Speaking Writing Prep 9 every 3 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Data School | IELTS Speaking Writing Prep 9 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 28 MB | 37 MB |
| Requires iOS | **12.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Data Analytics LLC](https://appshunter.io/developer/1628946212) | [Okay Kacar](https://appshunter.io/developer/1793346747) |

## What reviewers say

### Data School

[App page](https://appshunter.io/ios/app/data-school/id1628946210)

**Features:** macOS Compatibility

**In-app purchases (27)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Llama AI туслах хөгжүүлэх | $4.99 | one-time |
| Python, ML үл хөдлөхийн үнэ | $9.99 | one-time |
| Procreate Дижитал Арт | $9.99 | one-time |
| Бизнес Excel 2.0 Ахисан шат | $9.99 | one-time |
| Дата анализ SPSS цахим ном | $9.99 | one-time |
| Unsupervised Machine Learning | $12.99 | one-time |
| PowerBI DAX KPI боловсруулах | $12.99 | one-time |
| Өгөгдлийн цэвэрлэгээ | $14.99 | one-time |
| ARIMA хугацааны цуваа Python | $14.99 | one-time |
| Excel Дата Анализ | $19.99 | one-time |
| R программ өгөгдөл дүрслэх | $19.99 | one-time |
| SQL Дата Анализ | $23.99 | one-time |
| Supervised Machine Learning | $24.99 | one-time |
| Machine Learning Capstone | $24.99 | one-time |
| Streamlit ашиглан дата апп | $24.99 | one-time |
| Data Science Python | $25.99 | one-time |
| Бизнес EXCEL 1.0 | $28.99 | one-time |
| Дата аналитикс үндэс | $29.99 | one-time |
| ML практик ур чадвар | $29.99 | one-time |
| Excel VBA Автоматжуулалт | $29.99 | one-time |
| Машин сургалтын үндэс | $29.99 | one-time |
| Deep Learning TensorFlow Keras | $29.99 | one-time |
| Power BI ДАШБОАРД | $31.99 | one-time |
| Дата Анализ SPSS | $31.99 | one-time |
| Статистикийн үндэс | $34.99 | one-time |
| Дата Анализ R | $38.99 | one-time |
| IELTS Academic цогц сургалт | $39.99 | one-time |


### IELTS Speaking Writing Prep 9

[App page](https://appshunter.io/ios/app/ielts-speaking-writing-prep-9/id6742688883)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $12.99 | per 7 days |
| Monthly | $19.99 | per month |
| Yearly IELTS AI | $69.99 | per year |


## Frequently asked questions

### Is Data School free?

Data School is free to download, with in-app purchases available.

### Is IELTS Speaking Writing Prep 9 free?

IELTS Speaking Writing Prep 9 is free to download, with in-app purchases available.

### Do Data School or IELTS Speaking Writing Prep 9 have ads?

IELTS Speaking Writing Prep 9 shows ads; Data School does not.

### Which is updated more often, Data School or IELTS Speaking Writing Prep 9?

Data School ships an update every 2 weeks, and IELTS Speaking Writing Prep 9 every 3 weeks. Most recently, Data School was updated on October 7, 2026 and IELTS Speaking Writing Prep 9 on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*